[QUOTE]Ka-2b Pilot
From the Hunter T Mark 7 Air Publications A.P. 101B-1302- 1, Chapter 2, Fuel System, 18. Under certain conditions of flight, particularly during inverted flying .... I'd hope that some of the controls and gauges will be intact and give the authorities some factual info to determine cause. /QUOTE]
Not sure what you are getting at here, Ka. The Hunter has vapour release valves fitted, and anyway if there is a transfer failure, the warning doll's eyes will turn white and the fuel gauges will then indicate only what is available to the engine, i.e. 790 lbs per side. If you miss that warning, then a couple of minutes later, the very visible bingo lights will come on at 650lbs per side, which is a signal to land quite soon.
Fuel problems, flameouts etc., are probably red herrings because if you have a problem of this nature before the vertical upwards phase is reached, you will roll over and pull out of the manoeuvre. If already in the upwards vertical, you would complete the top of the loop and then roll off and go and sort the problem, or do a forced landing, or an ejection over the designated safe ejection area.